Took turns (4)
'took turns?' is the definition.
(rotating is a kind of taking turns)
This is all the clue.
(Other definitions for rotated that I've seen before include "Turned around axis or central point" , "Had spin" , "Turned round" , "Revolved" , "Went round" .)
'took turns' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for spun that I've seen before include "Rapidly rotated" , "As yarn or silk may be" , "treated by doctors?" , "did quick turn" , "Rotated cricket-ball" .)